var path = require('path'); var webpack = require('webpack'); module.exports = { module: { preLoaders: [ { test: /\.js$/, loader: "source-map-loader" } ], loaders: [ { test: /\.json$/, loader: "json" }, { test: /\.js$/, loader: "babel-loader?presets[]=es2015&presets[]=react", include: path.resolve('./src') }, ], }, plugins: [ new webpack.DefinePlugin({ 'process.env': { NODE_ENV: JSON.stringify(process.env.NODE_ENV) } }), ], devtool: 'source-map', };